1 files changed, 53 insertions, 0 deletions
diff --git a/llvm/test/Analysis/DependenceAnalysis/ZIV.ll b/llvm/test/Analysis/DependenceAnalysis/ZIV.ll
new file mode 100644
index 00000000000..42b2389df26
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/ZIV.ll
@@ -0,0 +1,53 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'ZIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;;  A[n + 1] = ...
+;;  ... = A[1 + n];
+
+define void @z0(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+  %add = add i64 %n, 1
+  %arrayidx = getelementptr inbounds i32* %A, i64 %add
+  store i32 0, i32* %arrayidx, align 4
+  %add1 = add i64 %n, 1
+  %arrayidx2 = getelementptr inbounds i32* %A, i64 %add1
+  %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - consistent flow!
+  store i32 %0, i32* %B, align 4
+  ret void
+}
+
+
+;;  A[n] = ...
+;;  ... = A[n + 1];
+
+define void @z1(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+  %arrayidx = getelementptr inbounds i32* %A, i64 %n
+  store i32 0, i32* %arrayidx, align 4
+  %add = add i64 %n, 1
+  %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+  %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+  store i32 %0, i32* %B, align 4
+  ret void
+}
+
+
+;;  A[n] = ...
+;;  ... = A[m];
+
+define void @z2(i32* %A, i32* %B, i64 %n, i64 %m) nounwind uwtable ssp {
+entry:
+  %arrayidx = getelementptr inbounds i32* %A, i64 %n
+  store i32 0, i32* %arrayidx, align 4
+  %arrayidx1 = getelementptr inbounds i32* %A, i64 %m
+  %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow!
+  store i32 %0, i32* %B, align 4
+  ret void
+}